<template>
	<view>
		<view class="search-box">
		<uni-search-bar @confirm="search" @input="input" :focus="true" cancelButton="none"></uni-search-bar>
		</view>
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length!==0">
			<view @click="gotoDetail(item)" class="sugg-item" v-for="(item,i) in searchResults" :key="i">
				<view class="sugg-name">{{item.goods_name}}</view>
				<uni-icons type="right" size="16"></uni-icons>
			</view>
		</view>
		<!-- 搜索历史 -->
		<view class="history-box" v-else="searchResults.length===0">
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list" >
				<uni-tag v-for="(item,i) in histories" :key="i" :text="item" @click="gotGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				//延时器的timerId
				timer: null,
				//搜索关键字
				kw: '',
				//搜索结果列表
				searchResults: [],
				//历史搜索结果
				historyList:['a','apple','q']
			};
		},
		onLoad(){
			this.historyList=JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods: {
			input(e) {
				//清除延时器
				clearTimeout(this.timer)
				this.timer = setTimeout(() => {
					//如果500毫秒内没触发新的输入事件，则为搜索关键词赋值
					this.kw = e
					this.getSearchList()
				}, 500)
			},
			async getSearchList() {
				if (this.kw === '') {
					this.searchResults = []
					return
				}
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/qsearch', {
					query: this.kw
				})
				if (res.meta.status != 200) return uni.$showMsg()
				this.searchResults=res.message
				this.saveSearchHistory()
			},
			gotoDetail(item){
				uni.navigateTo({
					url:"/subpkg/goods_detail/goods_detail?goods_id="+item.goods_id
				})
			},
			saveSearchHistory(){
				const set=new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList=Array.from(set)
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			clean(){
				this.historyList=[]
				uni.setStorageSync('kw','[]')
			},
			gotGoodsList(kw){
				uni.navigateTo({
					url:"/subpkg/goods_list/goods_list?query="+kw
				})
			}
		},
		computed:{
			histories(){
				return [...this.historyList].reverse()
			}
		}
	}
</script>

<style lang="scss">
	.sugg-list{
		// 上下0,左右5
		padding: 0 5px;
		.sugg-item{
			display: flex;
			// 纵向居中
			align-items: center;
			// 横向两端对齐
			justify-content: space-between;
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			.sugg-name{
				// 不允许换行
				white-space: nowrap;
				//超出部分隐藏
				overflow: hidden;
				//用...代替超出部分
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}
	.history-box{
		padding: 0 5px;
		.history-title{
			display: flex;
			justify-content: space-between;
			height: 40px;
			align-items: center;
			font-size: 13px;
		}
		.history-list{
			display: flex;
			flex-wrap: wrap;
			.uni-tag{
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
</style>